Color problem

[YZBruh]

The colors on the screen constantly (especially when I am in contact with the screen) become faded and colorful, as if a flash explodes. It does this very quickly. The color is also faded in the screenshots I took when the screen was in that state. And it reduces performance. I will leave a video to explain better.

As I said above, the colors fade and flash rapidly with each contact with the screen. And sometimes it just stays that way.

I want to get rid of the problem...

video_20240105_232555_854x480.mp4

The screenshot I'm talking about (don't care which app it is xd):

• Device: Alcatel 3T 10 (8088X model. tb8765ap1_bsp)
• Build Flavor: system-arm32-binder-64-ab-vanilla.img.xz
• Version: Android 14

[phhusson]

Notes: https://www.gsmarena.com/alcatel_3t_10-9601.php / launched with Android 8.1 / SoC is MT8765WB with Imagination PowerVR GPU

[phhusson]

Send the result of adb shell dumpsys SurfaceFlinger on Settings screen before the screen turns white, then while it is white.

[YZBruh]

Notes: https://www.gsmarena.com/alcatel_3t_10-9601.php / launched with Android 8.1 / SoC is MT8765WB with Imagination PowerVR GPU

The device comes with Android 9 :/

[YZBruh]

Send the result of adb shell dumpsys SurfaceFlinger on Settings screen before the screen turns white, then while it is white.

Ok. I'm doing it now

[YZBruh]

@phhusson The printouts are too long. So I saved it to a file. There are outputs that are in white color from the first to the 2136th line. After black.

dumpsys.log

[phhusson]

What happens if you tick Disable HW overlay ?

[YZBruh]

What happens if you tick Disable HW overlay ?

The screen remains completely white 🤮

[ArsBinarii]

Same issue here
Image:
android_14.0.0_r21 ci-20240105
system-td-arm64-ab-vanilla.img

android_14.0.0_r2 ci-20231012
system-td-arm64-ab-vanilla.img

android_13.0.0_r73 ci-20230905
system-td-arm64-ab-vanilla.img

android_13.0.0_r41 ci-20230527
system-td-arm64-ab-vanilla.img

Hardware:

Oukitel k12
CPU MTK: 6765
Android 9 at launch
integrated graphics card is PowerVR GE8320

Symptom:

1. by default image has washed out colors, problem identified as in some cases (scroll/animation..etc) real colors are visible - equivalent to a white overlay with alpha set to ~20%.
2. it seems that the clear screen (where the "overlay" is not present) animate and move faster
3. android startup logo flashing

Disable HW overlay - permanent washed out colors, during animations and transitions the "real color screen" is no longer visible

What I tried:
Disable HW Overlay on/off
ForceFPS from don't force to 1080x2340@60.330006
Mediatek GED KPI Support on/off

SurfaceFlinger_MTKMT6765_DisableHwO_ON.txt
SurfaceFlinger_MTKMT6765_DisableHwO_OFF.txt

[phhusson]

Can you also test on Android 10, 11 and 12? (from https://github.com/phhusson/treble_experimentations/releases/ )

[ArsBinarii]

yeah, yeah :)) I did 12 - AOSP 12.1 v416 and the "flickering" was not there, I am familiar with your work :).

do you need 11 and 10 ?

Also ponces's Pixel Experience 13 has the same issue, 12 is OK

[phhusson]

Nope, knowing that 12 is ok is enough, thanks. Just to confirm, 12 is okay even if you tick "disable gpu overlay"?

[ArsBinarii]

correct, Disable HW Overlay on/off 12, keeps the same colors and no issues are to be seen. seems the problem started with 13.

[ArsBinarii]

if I have some more free time later today I will try all 13 builds below 41 maybe I can identify the one that introduced the issue